| 18.9.1983 | 1000 km Brands Hatch | 2 | 956 | Bell / Bellof | Rothmans Porsche | 3rd |
| 18.9.1983 | 1000 km Brands Hatch | 8 | 956 | Wollek / Johansson | Sorga S.A. | 6th |
| 18.9.1983 | 1000 km Brands Hatch | 11 | 956 | Warwick / Fitzpatrick | John Fitzpatrick Racing | 1st |
| 18.9.1983 | 1000 km Brands Hatch | 12 | 956 | Schornstein / Heyer | Sorga S.A. | DNA |
| 18.9.1983 | 1000 km Brands Hatch | 15 | 936C | Heyer / Schornstein / Merl | Sorga S.A. | 7th |
| 18.9.1983 | 1000 km Brands Hatch | 18 | 956 | Plankenhorn / Regout / Lässig | Obermaier Racing | 5th |
| 18.9.1983 | 1000 km Brands Hatch | 22 | CK5 | Konrad / Kroesemeijer | Porsche Kremer Racing | 12th |
| 18.9.1983 | 1000 km Brands Hatch | 42 | CK5 | Dron / Jones / Cleare | R.C. Racing | DNF |
| 18.9.1983 | 1000 km Brands Hatch | 47 | 956 | Galica / Sutherland / Henn | Preston Henn T-Bird Swap Shop | DNF |
| 18.9.1983 | Trans-Am Sears Point | 49 | 911 Carrera RSR | Bob Copeman | Copeman Racing | 18th |
| 18.9.1983 | Trans-Am Sears Point | 56 | 911 SC | Karl Durkheimer | Vasek Polak Racing | 14th |
| 18.9.1983 | Trans-Am Sears Point | 91 | 924 Carrera GTR | Bob Hagestad | Bob Hagestad Porsche-Audi | 29th |
| 18.9.1983 | 1000 km Brands Hatch | 91 | 930 | Amato / Gall / Yvon | Jürgensen and Sohn | DNF |
| 18.9.1983 | Trans-Am Sears Point | 96 | 911 SC | Terry Herman | | DNS |
| 25.9.1983 | Thundersports Brands Hatch | 5 | 935 K3 | Robinson / Wood | Robinson Demolition | raced |
| 25.9.1983 | Thundersports Brands Hatch | 34 | 934 Carrera RSR | Arif / Wood | Midkent Racing | raced |
| 25.9.1983 | Trans-Am Riverside | 55 | 934 | Rick Borlase | Coin Operated Racing | 20th |
| 25.9.1983 | Trans-Am Riverside | 91 | 924 Carrera GTR | Bob Hagestad | Bob Hagestad Porsche-Audi | 8th |
| 25.9.1983 | Trans-Am Riverside | 96 | | Parker Stevenson | | DNS |
| 25.9.1983 | Trans-Am Riverside | 98 | 934 | John Klug | John Klug Racing | 22nd |
| 25.9.1983 | RT Nürburgring | | 930 | Wolf-Dieter Feuerlein | Vogelsang | ?th |
| 2.10.1983 | 1000 km Fuji | 1 | 956 | Ickx / Mass | Rothmans Porsche | 2nd |
| 2.10.1983 | 1000 km Fuji | 2 | 956 | Bellof / Bell | Rothmans Porsche | 1st |
| 2.10.1983 | 1000 km Fuji | 3 | 956 | Boutsen / Pescarolo | Matsuda Collection | 4th |
| 2.10.1983 | 1000 km Fuji | 3T | 956 | Bellof / Ickx / Bell / Mass | Rothmans Porsche | T-car |
| 2.10.1983 | 1000 km Fuji | 6 | 956 | Schuppan / Fujita | Trust Racing Team | 3rd |
| 2.10.1983 | 1000 km Fuji | 8 | 956 | Takahashi / Schickentanz | Brun Speedbox Motorsport | 6th |
| 2.10.1983 | 1000 km Fuji | 11 | 956 | Fitzpatrick / Hobbs | John Fitzpatrick Racing | DNS |
| 2.10.1983 | 1000 km Fuji | 12 | 956 | Heyer / Wollek / Merl | Joest Racing | 5th |
| 2.10.1983 | 1000 km Fuji | 14 | 956 | Lammers / Palmer | Richard Lloyd Racing | DNA |
| 2.10.1983 | 1000 km Fuji | 21 | 956 | Alliot / Johansson | Porsche Kremer Racing | DNF |
| 2.10.1983 | 1000 km Fuji | 48 | 956 | Henn / Takahashi / Paul, Jr. | Alpha Racing | DNF |
| 8.10.1983 | Trans-Am Caesars Palace | 36 | 924 Carrera GTR | Paul Miller | Herman+Miller Porsche-Audi | 22nd |
| 8.10.1983 | Trans-Am Caesars Palace | 58 | 934 | Rick Borlase | Coin Operated Racing | 19th |
| 16.10.1983 | 1000 km Imola | 8 | 956 | Wollek / Johansson | Joest Racing | 3rd |
| 16.10.1983 | 1000 km Imola | 11 | 956 | Fitzpatrick / Hobbs | John Fitzpatrick Racing | 2nd |
| 16.10.1983 | 1000 km Imola | 12 | 956 | Schornstein / Merl | Joest Racing | 6th |
| 16.10.1983 | 1000 km Imola | 14 | 956 | Bell / Palmer | Canon Racing | 4th |
| 16.10.1983 | 1000 km Imola | 18 | 956 | Plankenhorn / Regout / Lässig | Obermaier Racing | 5th |
| 16.10.1983 | 1000 km Imola | 91 | 930 | Dören / Mertes / Gall | Edgar Dören | DNF |
| 16.10.1983 | 1000 km Imola | 92 | 930 | Memminger / Kuhn-Weiss | Georg Memminger | 11th |
| 16.10.1983 | 1000 km Imola | 93 | 930 | Smith / Moreno / Cavalieri | Charles Ivey Racing | DNS |
| 16.10.1983 | 1000 km Imola | 98 | 930 | Del-Thé / Regusci | Hobby Rallye | 12th |
| 23.10.1983 | 1000 km Mugello | 8 | 956 | Wollek / Johansson | Joest Racing | 1st |
| 23.10.1983 | 1000 km Mugello | 11 | 956 | Boutsen / Fitzpatrick / Hobbs | John Fitzpatrick Racing | 4th |
| 23.10.1983 | 1000 km Mugello | 12 | 956 | Merl / Moretti / Schornstein | D. Schornstein R.T. Aachen/Joest | 6th |
| 23.10.1983 | 1000 km Mugello | 14 | 956 | Palmer / Bell / Toivonen | Canon Racing | 3rd |
| 23.10.1983 | 1000 km Mugello | 18 | 956 | Regout / Plankenhorn / Lässig | Obermaier Racing | 5th |
| 23.10.1983 | 1000 km Mugello | 91 | 930 | Wood / Mertes / Gall | Racing Team Jürgensen GmbH | DNF |
| 23.10.1983 | 1000 km Mugello | 92 | 930 | Memminger / Kuhn-Weiss | Georg Memminger | 15th |
| 23.10.1983 | 1000 km Mugello | 93 | 930 | Smith / Ovey / Smith-Haas | Charles Ivey Racing | 13th |
| 23.10.1983 | 1000 km Mugello | 96 | 930 | Lateste / Bienvault | Michel Lateste | 17th |
| 23.10.1983 | 1000 km Mugello | 99 | 930 | Leim / Kaiser | Strandell Racing | 16th |
| 29.10.1983 | Interserie Hockenheim | 1 | 956 | Bob Wollek | Joest-Racing | 1st |
| 29.10.1983 | Interserie Hockenheim | 2 | 956 | "John Winter" | Joest-Racing | 3rd |
| 29.10.1983 | Interserie Hockenheim | 9 | 935 | Antoine Salamin | Ecurie 13 Etoiles | 17th |
| 29.10.1983 | 3 h Hockenheim | 119 | 930 | Del-Thé / Regusci | | DNA |
| 29.10.1983 | 3 h Hockenheim | 126 | 935 | Pfefferle / Pfefferle | | ?th |
| 29.10.1983 | 3 h Hockenheim | 127 | 934 | | | DNA |
| 27.11.1983 | 3 h Daytona Finale | 00 | 911 | Case / Case | Case Racing | 47th |
| 27.11.1983 | 3 h Daytona Finale | 03 | 911 | Brown / Flippo | | 48th |
| 27.11.1983 | 3 h Daytona Finale | 05 | 935 M16 | Almeida / Morejon | T & R Racing | 5th |
| 27.11.1983 | 3 h Daytona Finale | 07 | 934 | Heimrath / Heimrath, Jr. | Heimrath Racing | 44th |
| 27.11.1983 | 3 h Daytona Finale | 09 | 911 Carrera RSR | Van Every / Tisdelle | Van Every Racing | 53rd |
| 27.11.1983 | 500 mile Fuji | 5 | 935 | Nagata / Shimoda | Nagata Racing (A) | DNF |
| 27.11.1983 | 3 h Daytona Finale | 5 | 935-84 | Akin / O'Steen | Bob Akin Motor Racing | 2nd |
| 27.11.1983 | 3 h Daytona Finale | 6 | 935 L | Foyt / Adam | Henn's Swap Shop Racing | 29th |
| 27.11.1983 | 500 mile Fuji | 6 | 956 | Fujita / Schuppan | Trust Racing Team | 1st |
| 27.11.1983 | 3 h Daytona Finale | 9 | 935 K3 | Baker / Blackaller / Mullen | Wayne Baker Racing | 30th |
| 27.11.1983 | 3 h Daytona Finale | 23 | 935 K3 | Lanier / Varde | | 43rd |
| 27.11.1983 | 3 h Daytona Finale | 30 | 935 J | Moretti / van der Merwe | Momo Racing | 7th |
| 27.11.1983 | 3 h Daytona Finale | 34 | 924 Carrera GTR | George Drolsom | Drolsom Racing | 65th |
| 27.11.1983 | 3 h Daytona Finale | 35 | 911 Carrera | Griffin / Price | | 21st |
| 27.11.1983 | 3 h Daytona Finale | 36 | 914/6 | Graves / Graves | | 42nd |
| 27.11.1983 | 3 h Daytona Finale | 58 | 924 Carrera GTR | Gregg / Forbes-Robinson | Brumos Racing | 17th |
| 27.11.1983 | 3 h Daytona Finale | 68 | 911 S | Rynerson / Wilder | Jack Rynerson | 40th |
| 27.11.1983 | 3 h Daytona Finale | 69 | 911 | Hofstra / Shafer | | 33rd |
| 27.11.1983 | 3 h Daytona Finale | 82 | 911 Carrera | George Hulse | | 27th |
| 27.11.1983 | 3 h Daytona Finale | 85 | 924 Carrera GTR | Lloyd / Oates | Richard Lloyd | 36th |
| 27.11.1983 | 3 h Daytona Finale | 87 | 924 Carrera GTR | Schneider / Leven | | 13th |
| 27.11.1983 | 3 h Daytona Finale | 90 | 911 SC | Schaefer / Sheehy | 901 Shop | 28th |
| 10.12.1983 | 1000 km Kyalami | 1 | 956 | Ickx / Mass | Porsche/Rothmans | 3rd |
| 10.12.1983 | 1000 km Kyalami | 2 | 956 | Bellof / Bell | Porsche/Rothmans | 1st |
| 10.12.1983 | 1000 km Kyalami | 3 | 956 | Holbert / Schuppan | Porsche/Rothmans | DNF |
| 10.12.1983 | 1000 km Kyalami | 8 | 956 | Wollek / Serra / Johansson | R. Joest/Lindsay Saker Motors | DNF |
| 10.12.1983 | 1000 km Kyalami | 11 | 956 | Boutsen / Hobbs / Wilson | Fitzpatrick Racing/Carwill | DNF |
| 10.12.1983 | 1000 km Kyalami | 12 | 956 | Schornstein / "Winter" / Wollek | R. Joest/P.G. Glass | 4th |
| 10.12.1983 | 1000 km Kyalami | 14 | 956 | Lammers / Palmer | Team Gunston | 5th |
| 10.12.1983 | 1000 km Kyalami | 15 | 936C | von Bayern / Brunn / Grögor | R. Joest/Warsteiner | 7th |
| 10.12.1983 | 1000 km Kyalami | 16 | 956 | van der Merwe / Martin / Duxbury | Fitzpatrick Racing/Kreepy Krauly | 6th |
| 10.12.1983 | 1000 km Kyalami | 22 | CK5 | Konrad / Kroesemeijer / Fouché | Pametex/Pretoria Brick | DQ |
| 10.12.1983 | 1000 km Kyalami | 35 | 956 | Stuck / Sigala / Grohs / Grano | Brun Motorsport | DNF |
| 10.12.1983 | 1000 km Kyalami | 71 | 930 | Felder / Hähnlein / Lateste | E. Doeren | NC |
| 10.12.1983 | 1000 km Kyalami | 73 | 930 | Braun / Brittz | Schiller | 11th |
| 10.12.1983 | 1000 km Kyalami | 74 | 930 | Wiren / Leim | B. Strandell | 9th |
| 10.12.1983 | 1000 km Kyalami | 75 | 930 | Del-Thé / Regusci | Scudeira Chico D'Oro | DNF |
| 10.12.1983 | 1000 km Kyalami | 76 | 930 | Cooper / Cavalieri / Smith | Charles Ivey/Black Widow/Metal Design | 10th |